Apparatus for separating magnetizable



Aug. 18., 1959 s. s. c. FLEISCHER APPARATUS FOR SEPARATING MAGNETIZABLEDROP WIRES DESIGNED TO INDICATE BREAKAGE IN THREADS OF A WARP IN A LOOMFiled May 9, 1957 s bmwa APPARATUS FOR SEPARATING MAGNETIZABLE DROPWIRES- DESIGNED TO INDICATE'BREAK- AGEIN THREADS OF A WARP IN A LOOMSvend Sigurd Christie Fleischer, Charlottenlund, Denmark Application May9, 1957, Serial No. 658,116

Claims. (Cl. 28-46) This invention relates to an improved apparatus forseparating magnetizable drop wires which aresituated a number of groupson guide rods and are designedto indicate breakage in threads of a warpin a loom. On each I of the threads of the warp a drop wire issuspended, the thread being carried through a hole in the drop wire. Incase a thread breaks the drop wire will fall'down into a positionshowing that the thread is broken. In this new position the drop wiremay possibly actuate members stopping the loom. Since the warp must haveroom for the drop wires the latter are arranged in severallaterallypositioned groups transversely of the warp.

There is already an apparatus which has magnets which areseparatelymoved forwards towards a group of drop wires and grip a dropwire at the same time as a wedge is moved in from the side between theforemost drop wire and the remaining drop wires, which are thusseparated, whereafter the foremost drop wire is retained while a warpthread is passed through its hole. From a mechanical point of view suchan apparatus is rather complicated and consequently expensive to make.Sometimes the apparatus is mounted in such a way that at the same timeas the thread is passed through the hole in the drop wire, the thread iscarried through one of the various implements of the loom, for instancethe heddles. The insertion of the threads through the heddles and thedrop wires is generally undertaken by two persons of which one separatesa thread from the warp while the other passes a hook mounted at the endof a rod through the heddle and the drop wire, catches the thread withthe hook and pulls the thread through the drop wire and the heddle. On

account of the distance between the drop wire and the heddle the rodwith the hook must be comparatively long,

up to about 50 cm. Such a long rod with a hook is diflicult to handle,and the operator will soon get tired from-the necessary great movementsof his arms. Consequently it will generally be more advantageous andtime-saving to draw the threadthrou'gh the drop wire and the heddle intwo operations.

The object of the present invention is to overcome these difficultiesand disadvantages and to provide an apparatus for separatingmagnetizable drop wires which are to be placed on the warp threads toindicate breakage in the threads.

' The invention contemplates in an apparatus for separating magnetizabledrop wires which are situated in a nummagnets, when the lever is movedforwards, are displaced --towards the drop wires and eachgrips-the-foremost drop States patent 2 wire of each of the groups ofdrop wires and by adisplacement backwards of the lever places the dropwires on the holding magnets which hold the drop wires while the warpthreads are being passed through the drop wires,

'means for the displacement forwards and backwards of the lever andmeans for the displacement of the gripping magnets verticallysimultaneously with the displacement forwards and backwards.

Further and important objects will become evident from a reading of thefollowing detailed description inthe light of the attached drawings, inwhich Fig. 1 shows the apparatus, viewed in vertical section at the lineII in Fig. 2,

Fig. 2 is a horizontal section at the line IIII in Fig. 1, 'Fig. 3 is ahorizontal section at the line III-III. in

Fig. 1,

, Fig. 4 is a front .view,

Fig. 5 is a detail plan view-partly in section showing a modified formof mounting of the holding magnets, and

Fig. 6 is a detail side view of a part of Fig. 5. The apparatus has acarriage frame 1, in which are mounted carriage wheel shafts 2 and 3with supporting frame 1. The holding magnets may be mounted in a rowvwith their holding faces in a plane at right angles to the and drivingwheels 4 by means of which the carriage can move on the rails 5 mountedon a frame not shown in the drawing. The drop wires 6 have holes orslots 7 by means of which the drop wires are suspended on a balance orguide rod 8. Moreover, each of the drop wires has a hole 9 through whicha warp thread can be passed. Furthermore the apparatus is provided withholding magnets 10 arranged on arms 11 mounted on the carriage movingdirection of-the carriage, i.e. at right angles to the rails 5, as shownin the drawing Fig. 2, but the magnets may equally well be arranged inan oblique row in such a way that their holding faces will be in a planeat an angle of less than 90 to the direction of movement of thecarriage, as shown in the drawing Fig. 5. The holding surfaces of themagnets are then correspondingly oblique. In both instances the magnetsmay be mounted on arms 11 of different lengths so that the magnets maybe displaced relative to each other in the direction in which they move.

Generally four to six groups or rows of drop wires are used and acorresponding number of magnets. The drawing shows six groups of dropwires and six magnets'corresponding thereto. Moreover, the apparatus hasa number of gripping magnets 12corresponding to the number of groups ofdrop wires and mounted on supports 13 which are arranged displaceably inguiding members 14 arranged on a holder 15 which is carried by a lever16 having an elevated rear portion which by an obliquely positioned or.oifset portion 16a is connected to a lower positioned portion 1612.Between the magnets 12 and the guiding members 14 there are around thesupports 13, helical springs 17 giving the supports 13 with the magnets12 a certain movability in the axial direction of the supports, whichmovement is limited in the downward direction by pins 18 which arepassed through the supports above the guiding members 14. The rear partof the lever has its rear .end connected by a pivot 19 to an arm 20which is rigidly mounted on a toothed rack 21. The latter'canbe movedforwards and backwards in its longitudinal direction, and during suchmovement, is guided at its under side by means of a bracket 22 arrangedon the carriage 1,;.and guided at its upper side by means of a bracket23 which is likewise mounted on the carriage 1 and grips round a rail 24on the toothed rack 21. The lever 16, 16a, 16b is during itsreciprocating movement guided by means of a pin 25 mounted on thecarriage frame 1 and passing through a slot 26 in the lever and havingoutside the lever a disc or head 27. Moreover, the forward portion 16bof the lever is guided between a couple of-arms28mounted holder 45.

on the carriage frame 1 and between which there is on a shaft 29carrying a rotatable roll 3% supporting the lever. The obliquelypositioned portion 16a of the lever will cause the gripping magnets 12.-mounted on the lever to be lowered during their movement against thedrop wires 6 to the position shown with dotted lines in Fig. 1 and to belifted during their movement against the holding magnets 10. Thereciprocating movement of the toothed rack 21 is brought about in themanner of construction of the apparatus shown in the drawing by means ofa mechanism having a cogged wheel 32 engaging with the toothed rack 21and arranged on a shaft 33 mounted in the carriage frame. ranged acogged wheel 34 engaging with a cogged wheel 35 mounted on a shaft 36journaled in the carriage frame 1. On the shaft 36 there is arranged atthe upper side of the carriage frame, a cogged wheel 37 engaging with atoothed rack 38 which can be moved forwards and back-,

wards in its longitudinal direction by means of a crank or eccentricmechanism 39 driven in the conventional manner by an electric motor, notshown in the drawing. The toothed rack 38 is guided in its movement bymeans of a guiding member 40 mounted on the carriage frame 1. Theapparatus is moved forward against the drop wires 6 by means of amechanism having a warping drum round which is wound a tightened cord 42the two ends of which are fastened to the frame carrying the rails 5.The warping drum is in fixed connection with a pawl wheel 43, and bothparts are arranged to rotate freely on the driving Wheel shaft 3.Moreover, the mechanism has a pawl 44 arranged in a holder 45oscillatorily mounted on the shaft 3. The pawl 44 is kept in engagementwith the pawl wheel 43 by means of a helically wound spring 46 extendedbetween the pawl and the carriage frame. The holder 45 is swung to andfro by means of a pulling rod 47 in linked connection with the same. Theother end of the pulling rod 47 is in linked connection with an arm 48which can swing on a pin 49 on the carriage frame 1. Moreover, thepulling rod 47 has an arm 50 which, by means of a helically wound spring66 extended between the holder 45 and the carriage frame 1, is keptagainst a pin 51 on an arm 52 which is fixedly mounted on thealternately rotated shaft 36. The magnitude of the swinging movement ofthe holder 45 and consequently the turning of the warping drum 41 can belimited and adjusted by means of a screw 53 arranged in the carriageframe, which screw 53 is adjusted in relation to the In order to preventan unintended turning back of the warping drum 41 there is arranged in aholder 54 on the carriage frame 1, a counter pawl 55 kept in engagementwith the pawl wheel 43 by means of a helically wound spring 56 extendedbetween the pawl and the carriage frame. The apparatus is in a mannerknown per se equipped with electric starting and stopping membersarranged in such a way that the apparatus is started by a manualpressure on a button closing the electric current, and the apparatus isautomatically stopped when the current is interrupted after it hasperformed a working period, i.e., whenever a set of drop wires has beenseparated.

When the drop wires 6 have been moved to the holding magnets as shown indotted lines in Fig. 1, and the warp threads have been passed throughthe holes in the drop wires, the drop wires are manually pushed a littlebackwards relative to the magnets and still suspended on the guidingrods 8.

What I claim by my invention and desire to secure by Letters Patent inthe United States is:

1. In an apparatus for separating magnetizable drop wires which aresituated in a number of groups on guide rods and are designed toindicate breakage in warp threads, the combination of a frame, acarriage movable on the frame, and means to drive the carriage, holdingmagnets in a number corresponding to the number of groups of drop wiresand placed stationary on the car- On the said shaft 33 there isfurthermore ar-,

there are mounted gripping magnets in a number correspondingto thenumber of groups of drop wires, which gripping magnets, when the leveris moved forwards, are displaced towards the drop wires and each gripsthe foremost drop wire of the respective groups of drop wires, and by adisplacement backwards of the lever place the drop wires on the holdingmagnets which hold the drop wires while the warp threads are beingpassed through the drop wires, means for the displacement forwards andbackwards of the lever and means for the displacement of the grippingmagnets vertically simultaneously with the displacement forwards andbackwards.

2. In an apparatus for separating magnetizable drop wires which aresituated in a number of groups on guide rods and are designed toindicate breakage in warp threads, the combination of a frame, acarriage movable on the frame, and means to drive the carriage, holdingmagnets in a number corresponding'to the number of groups of drop wiresand placed stationary on thecarriage, each of said magnets alined with arespective rod and facing the group of drop wires thereon, said holdingmagnets being placed in a row in such a manner that they will bedisposed in a plane at an angle less than 90 to the direction ofmovement of the carriage, a lever displaceably mounted on the carriage,on which lever there is mounted gripping magnets in a numbercorresponding to the number of groups of drop wires,'which grippingmagnets, when the lever is moved forwards, are displaced towards thedrop wires and each grips the foremost drop wire of the respectivegroups of drop wires, and by a displacement backwards of the lever placethe drop wires on the holding magnets which hold the drop wires whilethe warp threads are being passed through the drop wires, means for thedisplacement forwards and backwards of the lever and means for thedisplacement of the gripping magnets vertically simultaneously with thedisplacement forwards and backwards.

3. In an apparatus as claimed in claim 2 having holding magnets theholding surfaces of which are disposed in a plane at an angle less thanto the direction of movement of the carriage. I

4. In an apparatus for separating magnetizable drop wires which aresituated in a number of groups on guide rods and are designed toindicate breakage in warp threads, the combination of a frame, acarriage movable on the frame, and means to drive the carriage, holdingmagnets in a number corresponding to the number of groups of drop wiresand placed stationary on the carriage, each of the magnets alined with arespective guide rod and facing the group of drop wires thereon, a leverdisplaceably mounted on the carriage, on which lever there are mountedgripping magnets in a number corresponding to the number of groups ofdrop wires, which gripping magnets, when the lever is moved forwards,are displaced towards the drop wires and each grips the foremost dropwire of each of the groups of drop wires and by a displacement backwardsof the leverplace the drop wires on the holding magnets which hold thedrop wires while the warp threads are being passed through the dropwires, said combination further including means for the displacementforwards and backwards of the lever, said lever having an elevatedportion which by an obliquely positioned portion is connected to a lowerpositioned portion, the said elevated portion has at is free rear end alinked connection with driving means for the displacement forwards andbackwards of the lever, the said lower positioned portion carries at itsfree front end the said gripping magnets, the lever being guided in itsvertical movement by means of a pin stationarily mounted on thecarriage, which pin extends through a slot in the elevated portion ofthe lever and said lever is supported by a roll mounted on a secondstationary pin on the carriage and said pin is placed in such a mannerthat when the obliquely positioned portion of the lever, during theforward movement of the lever, passes the said roll, the grippingmagnets will be lowered towards the drop Wires to be gripped, and thatthe gripping magnets during the backward movement of the lever will belifted to their starting position when the obliquely positioned portionof the lever passes over the said roll, and means for the verticaldisplacement of the gripping magnets in relation to the lever on whichthey are mounted.

5. In an apparatus as claimed in claim 4, in which the verticallydisplaceable gripping magnets are mounted on UNITED STATES PATENTS1,512,704 Magnano Oct. 21, 1924 2,512,165 Meier June 20, 1950 FOREIGNPATENTS 709,424 Great Britain May 26, 1954

